Spiderbeam Aerial-51 Model 404-UL Antenna
Ultra-Lightweight | Multiband HF | New Zealand Distributor
Engineered for serious amateur radio operators who demand performance without compromise, the Spiderbeam Aerial-51 Model 404-UL is a high-performance, ultra-lightweight Off-Centre Fed Dipole (OCFD) antenna that delivers exceptional results across multiple HF bands. Whether you're operating from a mountaintop, your backyard, or in a stealthy HOA-restricted setup, this antenna offers impressive capability in a compact, rugged package.
Built for Portability – Designed to Last
Weighing just 435 grams (including 12m of RG-174 coax), the 404-UL lives up to its "Ultra-Lightweight" name. Yet it's no lightweight when it comes to strength — built with Kevlar-reinforced insulated wire, stainless steel hardware, and a Teflon-insulated, gold-plated PL-259 connector, it’s designed to survive harsh climates, high winds, snow, and ice.
Whether you're using it with a Spiderbeam 12m Spiderpole or a permanent mast, the Model 404-UL combines durability with a low-profile footprint that becomes nearly invisible when erected 10m or higher.
Multiband Coverage Without a Tuner
The Aerial-51 404-UL provides tuner-free operation on 40m, 20m, 15m, 10m, and 6m, and supports additional bands (17m, 12m, and 30m) with a tuner. A specially designed current balun reduces common-mode noise, resulting in a cleaner, quieter receive performance — especially when compared to End-Fed Half-Wave (EFHW) or traditional dipole antennas without baluns.
Designed for:
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Portable HF operations (POTA, SOTA, field days, emergency comms)
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Stealthy installations in HOA-regulated areas
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Base stations in cold climates with harsh weather
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Operators using fiberglass telescoping masts (ideal with Spiderbeam poles)
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Hams running 200W SSB/CW or moderate digital modes
Technical Specifications:
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Bands (no tuner): 40m, 20m, 15m, 10m, 6m
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Bands (tuner recommended): 17m, 12m
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Band (tuner required, reduced power): 30m
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Power Handling:
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SSB/CW: 200W (50W max on 30m)
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Digital: 50–100W (mode dependent)
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Overall Length: 20.5 meters (~67 feet)
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Weight: 435g (15 oz), including coax
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Coax: 12m (40 ft) RG-174, permanently attached
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Wire: Stranded copper, Kevlar-reinforced, insulated
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Connector: PL-259, gold-plated, Teflon insulated
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Mounting Hardware: Stainless Steel (V2A)
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Visibility: Nearly invisible above 10m height
Why Choose the Aerial-51 404-UL?
If you're looking for a lightweight HF antenna that performs like a heavyweight, this is it. With excellent band coverage, low-noise receive, rugged construction, and stealth-friendly design, the 404-UL is a smart choice for NZ hams who value quality, portability, and performance.
Reviews of the Aerial-51 404-UL
There are a number of good reviews of this Antenna done by eHAM.net and Aerial-51
In Stock – Sold in New Zealand
In Stock – Sold in New Zealand
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Perfect Companion to Spiderbeam Telescoping Poles